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Boker Cronidur Lockback Pocket Knife features a Rockwell hardness of 58 and the blade composition needed, this blade will sharpen and hold an edge unlike any other steel currently available. Boker Lockback Folding Knife has the new Cronidur 30 steel, with elegant Grenadill wood handles are crafted with finger grooves and palm swell to fit the hand perfectly while providing sure control. Cronidur 30 is the latest of the premium steels coming out of the space shuttle program and Boker is the first to have it available to the sporting knives industry. Cronidur 30 was developed for use in the aircraft and aerospace applications, where component durability, reliability and long life are a must. Cronidur 30 is superior in corrosion resistance to 440C stainless steel. Large carbides evident in other high grade steels do not exist in Cronidur 30. Instead, there is a homogenous structure of finely dispersed carbon nitrides. The Boker Cronidur Lockback Classic Pocket Knife comes complete with a leather sheath.